A thought

I have a thought, maybe if I give others a laugh it might help me to smile. So here we go..................Three engineers and three accountants are traveling by train to a conference. At the station, the three accountants buy tickets and watch as the three engineers buy only a single ticket. "How are three people going to travel on only one ticket?" asked the accountants.
"Watch and you'll see," answers an engineer.
They all board the train. The accountants take their respective seats but all three engineers cram into a restroom and close the door behind them.
Shortly after the train had departed, the conductor comes around collecting tickets he knocks on the restroom door and says "Ticket please."
The door opens just a crack and a single arm emerges with the ticket in hand. The conductor takes it and moves on. The accountants all agree that this is a very clever idea.
So after the conference, the accountants decide to copy the engineers and buy only a single ticket for the return trip and save some money ( being good with money and all)
When they get to the train station the accountants buy a single ticket for the return trip. To their astonishment, the engineers don't buy ticket at all. " How are you going to travel without a ticket?" says one perplexed accountant.
"Watch and you'll see," answers an engineer.
When the board the train the three engineers cram into one restroom and the three accountants cram into an opposite restroom. The train departs.
Shortly afterward, one of the engineers leaves the restroom and walks over to the restroom where the accountants are hiding.
He knocks on the door and says "Ticket please."